10/30/16 Update: Aha! It appears this is a Dick's Sporting Goods blimp. An employee of Ellington Airport, Marco A, has been watching the blimp and he graciously wrote in to let us know! I did some digging as well, and it does indeed turn out the blimp was in Houston in October!

A video showing a craft of some kind travel slowly in the Houston night sky has been posted to YouTube. As always, you be the judge... is this a UFO or something more explainable?